<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>布局</title>
</head>
<body>

<h2>布局1</h2>
<hr>

<div id="container" style="width: 800px;background-color: #8cebff" >

    <div id="header" style="background-color: azure">

        <h1 style="margin-bottom: 0px">这是标题</h1>
    </div>

    <div id="menu" style="background-color: lightyellow">

    </div>

</div>











</body>
</html>